obama and the economy. if you can't get it right, it's time to get out. >> reporter: the republican ticket is hoping their bus tour will make up lost ground in ohio as polls hoe mitt romney trailing president obama in this pivotal swing state. in dayton tuesday romney hammered mr. obama on tacks. >> i admit this one thing he did not do in his first four years, he has said he is going to do in the next four years which is to raise taxes, and is there anybody that thinks that raising taxes will help grow the economy? >> reporter: an attack over tacks is actually a change for romney, who is often accused the president of raising taxes in his first term. romney is looking to jump-start his campaign with a good performance in the first debate one week from today. the man who plays mr. obama in romney's mock debate sessions, though, tried to lower expectations playing up the president's experience. >> he has been through a lot of those one-on-one debates with a republican. mitt has not, and you think about it, he